Troupers perform in the large-scale legendary play "Wu Zetian" in Luoyang, central China's Henan Province, May 9, 2017. Wu Zetian, China's only recorded empress, was initially a concubine to Emperor Taizong in the Tang Dynasty (618-907). When he died, Wu married his successor, Emperor Gaozong, and ruled the country in her own right after Gaozong suffered a stroke. (Xinhua/Li An)
